Question $2$: $(30$ Marks$)$ Given a $100-$Watt power source and using Figure $1$ below that shows attenuation of typical guided media, what is the maximum allowable length for the following transmission media if a signal of $1$ Watt is to be received? a$)24-$gauge $(0\mathrm{.}5$ mm$)$ twisted pair operating at $300$ kHz b$)24-$gauge $(0\mathrm{.}5$ mm$)$ twisted pair operating at $1$ MHz c$)0\mathrm{.}375-$inch $(9\mathrm{.}5$ mm$)$ coaxial cable operating at $1$ MHz d$)0\mathrm{.}375-$inch $(9\mathrm{.}5$ mm$)$ coaxial cable operating at $25$ MHz e$)$ optical fiber operating at its optimal frequency $($a$)$ Twisted pair $($based on $[$REEV$95])$

$($b$)$ Coaxial cable $($based on $[$BELL$90])$

$($c$)$ Optical fiber $($based on $[$FREEO$2])$

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$($d$)$ Composite graph

Figure $1.$ Attenuation of Typical Guided Media